Constraining Anomalous Forces with Pseudoscalar and Axial Couplings Employing a Spin-Independent Analysis

TL;DR

This paper explores new methods to improve laboratory limits on anomalous pseudoscalar and axial couplings, which are typically weaker than scalar and vector interactions, by investigating mechanisms that bypass this suppression.

Contribution

It introduces two mechanisms that can circumvent the suppression of pseudoscalar and axial interactions, leading to potentially stronger experimental constraints.

Findings

Identification of mechanisms to enhance sensitivity to pseudoscalar and axial couplings

Improved laboratory limits on anomalous pseudoscalar and axial interactions

Potential for more stringent tests of new physics models

Abstract

Present laboratory limits on the coupling strength of anomalous pseudoscalar and axial interactions are many orders of magnitude weaker than their scalar and vector analogs. Here we investigate two mechanisms which can circumvent this suppression and thereby lead to improved limits.